Highest temperature in Los Angeles on July 20?

Platform comparison

Market context

Los Angeles is currently enduring an extreme heatwave that has pushed temperatures well above normal for mid-July, with safety warnings issued across Southern California as the region faces dangerous conditions [3]. This active weather pattern contrasts sharply with the market’s current 0% probability for any temperature outcome, a stance that appears disconnected from the immediate reality of scorching conditions recorded just days prior [4].

Historical data from early July 2026 shows the city hit 74–75°F on July 4, a result the prediction market correctly anticipated [2]. However, the current heatwave is significantly more intense than that earlier event, with temperatures expected to remain elevated through the settlement window. The 0% implied probability likely stems from a market error or a misunderstanding of the settlement date, as the frontrunner outcome in similar markets is typically the 80–81°F range, which currently commands 100% probability in comparable event structures [1].

Traders should monitor daily Wunderground reports for the Los Angeles International Airport Station, the official resolution source, to track the actual peak temperature as the heatwave persists [1]. The primary catalyst is the continuation of this extreme weather system, which has already forced public health advisories and remains the dominant factor for July 20 temperatures [3]. No political debates or campaign disclosures influence this weather event; the market is leaning entirely on the meteorological forecast for the coming week.

Sources: 1 · 2 · 3 · 4

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Los Angeles on July 20? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.